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  <title>Divides two numbers, according to IEEE 754</title>
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  <div id="layout-content"><div id="function.fdiv" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">fdiv</h1>
  <p class="verinfo">(PHP 8)</p><p class="refpurpose"><span class="refname">fdiv</span> &mdash; <span class="dc-title">Divides two numbers, according to IEEE 754</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.fdiv-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>fdiv</strong></span>(<span class="methodparam"><span class="type">float</span> <code class="parameter">$num1</code></span>, <span class="methodparam"><span class="type">float</span> <code class="parameter">$num2</code></span>): <span class="type">float</span></div>

  <p class="para rdfs-comment">
   Returns the floating point result of dividing the
   <code class="parameter">num1</code> by the <code class="parameter">num2</code>.
   If the <code class="parameter">num2</code> is zero, then one of <code class="literal">INF</code>,
   <code class="literal">-INF</code>, or <code class="literal">NAN</code> will be returned.
  </p>
  <p class="para">
   Note that in comparisons, <code class="literal">NAN</code> will never <code class="code">==</code> or <code class="code">===</code>,
   any value, including itself.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.fdiv-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">num1</code></dt>

     <dd>

      <p class="para">
       The dividend (numerator)
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">num2</code></dt>

     <dd>

      <p class="para">
       The divisor
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.fdiv-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   The floating point result of
   <code class="parameter">num1</code>/<code class="parameter">num2</code>
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.fdiv-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3093">
    <p><strong>示例 #1 Using <span class="function"><strong>fdiv()</strong></span></strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">fdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">5.7</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1.3</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;float(4.384615384615385)<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">fdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">4</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">2</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;float(2)<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">fdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">1.0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0.0</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;float(INF)<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">fdiv</span><span style="color: #007700">(-</span><span style="color: #0000BB">1.0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0.0</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;float(-INF)<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">fdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">0.0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0.0</span><span style="color: #007700">));&nbsp;</span><span style="color: #FF8000">//&nbsp;float(NAN)<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.fdiv-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><a href="language.operators.arithmetic.html" class="link"><code class="literal">/</code></a> - Floating-point division</li>
    <li class="member"><span class="function"><a href="function.intdiv.html" class="function">intdiv()</a></span> - Integer division</li>
    <li class="member"><span class="function"><a href="function.fmod.html" class="function">fmod()</a></span> - Modulus</li>
   </ul>
  </p>
 </div>

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